Ultrasonic Sensor U-B

Transcription

1 MAINTAIN CONSTANT TENSION - The ultrasonic sensor is used to maintain constant tension when using a brake for producing unwind (payout) tension, or when using a clutch for rewind tension. The sensor measures the diameter of the roll & sends a 0-10 VDC signal to the Placid power supply. Torque is automatically varied as roll size changes, to keep tension constant. The sensor measures distances by sending an ultrasonic pulse of sound, and then measuring the time for the return echo pulse. Push Button Ø /2 foot cable 1.18 SET LED (Light Emitting Diode) Status Indicator Transducer Face SIDE VIEW TOP VIEW FRONT VIEW Dimensions = inches Ø 70 inches, max. 3.9 inches, min. Brake (for unwinding) - or - Clutch (for rewinding) Sensor Placid Industries Open or Enclosed Power Supply U-B:P1 1/1/05

2 The ultrasonic sensor measures the distance to the roll with ultrasonic sound. The sensor sends out a pulse of ultrasonic sound, and then measures the time for the echo pulse to return, to determine distance. MOUNTING SENSOR Ø 70 inches max. Brake (for unwinding) - OR - Clutch (for rewinding) 3.9 inches Minimum.787 Mounting holes 39.3 inches Maximum Point ultrasonic sensor directly at the center of the roll. The sensor may be horizontal, vertical, or at any angle. ULTRASONIC BEAM SIZE Keep unintended targets away from the ultrasonic beam. Sensor 2" 1" 0" 1" 2" Beam diameter Distance (inches) Ø1.6" Ø2.5" Ø3.2" Ø3.5" Ø3.6" Ø3.4" Ø3.0" Ø2.5" Ø1.8" Ø1.3" U-B:P2 10/18/04

3 WIRING CONNECTIONS OPEN POWER SUPPLY A.C. INPUT 110 A.C. Volts 220 / 230 A.C. Volts Unplug the top portion of input & output connector to attach wires. To Ground Lug on Base 1 Amp Input Fuse Volts A.C. 110/220 0 Volts ( Neutral ) 0 Connect 110 volts AC to 110 volt power supply models only. To Ground Lug on Base 1 Amp Input Fuse 230 Volts A.C. OR 220 Volts A.C /220 0 Volts Volts 220 / 230 Volts Connect 220 or 230 volts A.C. to 220 / 230 volt power supply models only. Brake (or Clutch) AC Input A.C. INPUT CONNECTOR Ground Lug SPAN MAX. potentiometer (to vary tension) OPEN POWER SUPPLY Set to '2' ULTRASONIC SENSOR OUTPUT CONNECTOR (optional) SPAN MAX. potentiometer (to vary tension). (See separate instruction sheet.) ULTRASONIC SENSOR ENCLOSED POWER SUPPLY WIRING BROWN BRAKE OR CLUTCH AMMETER (for set-up only) COIL OUTPUT (dc) + CONTROL INPUT 0-10v COM FOLLOWER POT + GREEN BLACK BLUE BROWN BLACK BLUE ULTRASONIC SENSOR CONTROL POT 0v 0-10v CTRL INPUT + COIL OUTPUT BRAKE OR CLUTCH OPEN POWER SUPPLY OUTPUT CONNECTOR U-B:P3 10/7/04

4 WIRING A REMOTE TENSION ADJUSTMENT POTENTIOMETER TO AN OPEN POWER SUPPLY The web tension is varied by adjusting the on-circuit-board Span Max. potentiometer or by a remotely mounted Span Max. potentiometer on the operator's panel. Open Power Supply, Top View B. OUTPUT CONNECTOR D. PLUG, 3 prong, - for a remote Span Max. Potentiometer, (for conveniently making tension adjustments when using the Follower Arm Potentiometer or Sensor) D B 3. SWITCH - to select either the on-circuit-board Span Max. pot. or remote Span Max. potentiometer 4. SPAN MAX. potentiometer - (for tension adjustments) 5. SPAN MIN. potentiometer - When using an ultrasonic sensor, set fully counter-clockwise, (10+ turns, until it clicks) WIRING THE POTENTIOMETER FOR REMOTE TENSION ADJUSTMENTS The web tension is varied by adjusting the on-circuit-board Span Max. Pot or by a remotely mounted Span Max pot on the operator's panel. Slide switch towards the '' plug, to select the remote pot. The same 500 ohm potentiometer that is used as the % Rated Current Pot in Manual Mode, can be used as the remote Span Max. pot. Disconnect the % Rated Current Pot from the Output Connector. Then connect the 3 wires from the pot to the 3 contact receptacle, as shown below. Plug the receptacle into 'D', marked '' on the power supply circuit board. Span Max. Potentiometer Receptacle Connect the 3 contact receptacle, to 'D', (marked '') on power supply circuit board. 500 ohm CW Receptacle SCHEMATIC U-B:P4 6/14

5 PROGRAMMING The ultrasonic sensor is programmed by pressing the 'SET' button, while viewing the LED Status Indicator'. Push Button LED Status Indicator SET TOP VIEW 1) Set the ROLL CENTER Remove the roll, and place an temporary target (a piece of cardboard works well), at the roll centerline, (or about 10% farther away from the sensor, to compensate for the non-linear torque curve of the brake or clutch). Temporary Target Unlock sensor Turn off the power supply for 5 seconds, then turn on again. Note: If the SET button is not pressed within 5 minutes, the sensor needs unlocking again. Prepare sensor for programming distances: Press and hold the 'SET' button for more than 2 seconds but less than 4 seconds, (until the 'LED Status Indicator' flashes alternately yellow and orange). Release the button, and the 'LED Status Indicator' flashes orange. Set the Roll Center: With the temporary target in place, momentarily press the 'SET' button. Then the LED flashes yellow. 2) Set the FULL ROLL SIZE Mount the largest size roll to be used. For convenience, a temporary target may be used instead (a piece of cardboard works well). Position the temporary target at the full roll diameter, or a little closer to the sensor, just in case some rolls are larger. Note: The sensor must be at least 3.9" from the roll. Momentarily press the 'SET' button. For 1 second, both the yellow and orange LED are on, then, just the yellow. If difficulty occurs, or the sensor doesn't respond as expected, turn off the power supply for 5 seconds, and start over. U-B:P5 6/11/04

6 After set-up and programming, the 'LED Status Indicator' will be continuously glowing yellow, indicating a target is within range. Push Button LED Status Indicator SET TOP VIEW COMMON PROBLEMS No audible 'buzzing' sounds from sensor The power is not on, or is connected with reverse polarity. When power is correctly applied, the sensor emits an audible, low volume buzzing sound. LED Status Indicator - Dark The power is not on, or is connected with reverse polarity. -or- The target is too close to the sensor, or the target is too far (either out of the programmed range, or out of the maximum possible range). LED Status Indicator - Doesn't respond when pressing the SET button The sensor is locked (to prevent accidental reprogramming). The sensor automatically locks if the SET button is not pressed within 5 minutes. To unlock sensor - Turn off the power supply for 5 seconds, and turn on again. LED Status Indicator - Flashing The sensor is in the programming mode. Recheck programming procedure. Power Input Range Output Resolution Repeatability Temperature Protection class Housing material SPECIFICATIONS ma. max inches ( mm) 0 to 10 volts D.C. 20 mamps max. Push-Button adjustable end points inches (<0.3 mm) 0.02 inches (<0.5 mm) 14 to 140 F (-10 to +60 C) IP67 Polyester TRANSDUCER LED Status Indicator - Glowing Orange The sensor detects an object, but is too close. Output increases as roll diameter decreases Set the roll center first. Then set the full roll size. Type Beam Shape Beam Angle Conical 10 degrees total PRECAUTIONS - Keep sensor away from sources of ultrasonic noise, such as pressurized air nozzles (air guns). - Keep unintended targets from the sensor's field of view. Keep the beam pattern in mind. TEMPERATURE EFFECTS At room temperature, a change of 10 will result in approximately 1% change (due to changes in the speed of sound). U-B:P6 6/11/04

7 POWER SUPPLY ADJUSTMENTS Open Power Supply D Output Connector TENSION ADJUSTMENT POTENTIOMETER Web tension is varied by either: Set switch to Position 2 SPAN MIN. POTENTIOMETER - Important - Set fully counter-clockwise (15 turns total or until it clicks). This circuit board mounted SPAN MAX. potentiometer, - or - a REMOTE SPAN MAX. potentiometer (which connects at PLUG 'D'.) SWITCH TO SELECT - ON-CIRCUIT BOARD SPAN MAX POTENTIOMETER for tension adjustments: Set SWITCH towards the edge of the circuit board. - OR - REMOTE SPAN MAX POTENTIOMETER for tension adjustments: Set SWITCH towards the middle of the circuit board. Note: The Span Max. potentiometer is plugged into 'D'. Note: Percent Rated Current Potentiometer has no effect Enclosed Power Supply PLACID % RATED CURRENT CURRENT ma CONSTANT CURRENT POWER SUPPLY SPAN MAX. POWER ON SPAN MIN. TENSION ADJUSTMENT POTENTIOMETER Web tension is varied by the circuit board mounted SPAN MAX. potentiometer. SWITCH (on underside of case) Set to POSITION 1: 0-10v CONTROL OR REMOTE FOLLOWER SPAN MIN. POTENTIOMETER - Important - Set fully counter-clockwise (15 turns total or until it clicks). U-B:P7 1/1/05